Cementation and bonding of indirect restorations

Question 1

The mechanisms that hold a restoration on a prepared tooth can be divided into

Answer 1

1. Nonadhesive (mechanical) luting
2. Micromechanical bonding
3. Molecular adhesion

Question 2

2 Types of luting cements in dentistry

Answer 2

1. Permanent
2. Temporary

Question 3

2 types of Permanent luting cements

Answer 3

1. Water based
2. Resin based

Question 4

Water based luting cements

Answer 4

1. Zinc polycarboxylate
2. Zinc phosphate
3. Glass Ionomer cement
   -Conventional
   -Resin modified

Question 5

Resin based luting cement

Answer 5

1. Self curing/light curing/dual curing
2. Adhesive/ self adhesive

Question 6

2 types of Temporary luting cements

Answer 6

1. Oil based
2. Oil free

Question 7

Oil based

Answer 7

1. Zinc oxide Eugenol
2. Temporary GIC

Question 8

Oil free

Answer 8

1. Zinc oxide non Eugenol

Question 9

Adhesive vs non adhesive cements

Answer 9

The difference is the mechanism of bonding.

1. Adhesive cements rely on molecular adhesion, which involves the formation of chemical bonds between the cement and the tooth structure.
2. Non-adhesive cements utilize micromechanical bonding, which is achieved through mechanical interlocking between the cement and the tooth surface.

Question 10

Properties of dental cements

Answer 10

Common properties of dental cements include:
1. Compressive strength: Dental cements should have adequate compressive strength to withstand chewing forces.

2. Adhesion: Adhesive cements should have good bonding properties to form a strong and durable bond with the tooth structure.
3. Solubility: Dental cements should have low solubility to prevent dissolution in oral fluids.
4. Setting time: The setting time of dental cements refers to the time it takes for the cement to harden and become fully set.
5. Esthetics: Dental cements used for esthetic purposes should have good color stability and match the natural tooth color.